libiconv, libcharset, module localcharset and locale_charset()

[Дилян Палаузов]

Hello,

on some systems, the function locale_charset () is provided by libiconv, 
on others by libcharset.  Why doesn't gnulib module localcharset try to 
find the function there, before building its body in libgnu.a?

Kind regards
  Дилян